Warp stop-motion for looms



(No Model.)

W. 1:". DRAPBR. WARP STOP MOTION PoR LooMs.

lwenor: VZhwQ/Eraper;

m: Ncnms PETERS co; Pun'munyu.. wAsmNcToN. n. c.

UNITED STATES Trucs.

, ATENT WILLIAM F. DRAPER, OE HOPEDAIE, MASSACHUSETTS, ASSIGNOR TO THE DRAPER COMPANY, OF SAME PLACE AND PORTLAND, MAINE.

WARP STOP-MOTION FOR LOOMS.

SPECIFICATION forming part of Letters Patent No. 594,344,

datedNcvember 23, 189'?.

Application filed February 26, 1897. Serial No. 625,232. (No model.)

To LZZ wltont t 71cm/ con/067471,.-

Be it known that I, WILLIAM F. DRAPER, of I'Iopedale, in the county of Worcester and 'State of Massachusetts, have invented an Improvement in Warp Stop-Motions for Looms, of which the following description, in connection With the accompanying drawings, is a speciication, like letters on the drawings representing like parts.

This invention relates more particularly to that class of looms wherein warp-stop-motion-actuating detectors are made operative through a coperating vibrator to effect the automatic stoppage of the loom upon breakage or undue slackening of a warp-thread, the affected detector at such time assuming an abnormal operative position. In various forms of construction looms have been provided with such Warp-stop-Inotion-actuating detectors, either in the nature of detectors pure and simple or when also serving as heddies, and in practice it has been found that the detectors, usually made as thin flat strips of metal, have shown a tendency to twist or bend when engaged by the vibrator. To overcome this tendency, the acting face of the vibrator has been serrated or finely toothed, and the fixed bar or support forthe opposite longitudinal edge o f an engaged detector has also been serrated, the object of the opposed serrated members being toprevent lateral movement of the detector when engaged. How' ever, the detectors are in such construction often caught in a slanting manner, tending to bend them and prevent the operation of the stopping mechanism of the loom.

This present invention has for its object the production of means for completely overcoming the objectionable `features hereinbefore stated in a simple and effective manner, my invention being applicable to all forms of stopmotion mechanism, including actuating-detectors and a coperating vibrator, my invention relating particularly to the construction of the latter.

Various novel features of my invention will be hereinafter described, and particularly pointed out in the claims.

Figure 1 is a longitudinal sectional view of a sufficient portion of a loom tobe understood with my inventionapplied thereto; and Fig.

2 is an enlarged horizontal sectional detail on the line :n Fig. 1, looking down.

It is immaterial what form of stop-motion Inechanism be employed, and I have illustrated my invention in connection with the loom forming the subject-matter of United States Patent No. 536,969, dated April 2, 1895, to which reference may be had.

The loom-frame A, cam-shaft A3, the lay A4, 6o carrying a reed, and the shipper-handle A6, heldl in place While the loom is running properly by the usual notched plate, (not shown,) are and may be all as common in looms.

The upriglits A provide bearings for a cross-shaft (LX, having pulleys a6, to which are connected straps a4 d5, attached to the upper bars a of the heddle-frames, the lower bars et of said frames being connected by the straps as' ai with the levers d10 (L12, each having, pref- 7o erably, aroll to be acted upon by the cams am w15, carried by the shaft A3, as in said Patent No. 536,969.

The top and bottom bars of the frames are connected by rigid side bars a2, and crossbars c carry the detectors d, herein serving also as heddles, said detectors being shown as thin flat metallic strips, each having a warp-receiving eye 2 andrslotted to receive the carrying-bars c. Three parallel plates 8o or bars b2 b3 b4 receive the lower ends of and act as guides for the detectors, the tops of said bars serving to support the warp-threads when in the lower plane of the shed, and the plane rear surfaces of the bars b2 b3 support a 85 dropped detector when engaged and pressed against such bar by the vibrator.

A rock-shaft f is supported in the loomframe, and the connected controller-lever g, havinga toe g', heel g2, and projection g3, the 9c spring g4, and the cam Gr, fast on theshaft A3 and provided with pins or projections h to at times coperate with the connecting-rod h', attached to the shipper-handle A6, said rod being controlled as to its position by the controller-lever g, are and may be as shown in said patent referred to and operate as therein described. The rock-shaft f has attached thereto upturned arms f2, to Which are attached the like vibrators f5 f6, one to coperroo series of deep notches f7 in the direction of the length -of the warp, the sides of the notches being parallel for the greater part of their length, as atfs, Fig. 2, said sides being flared or outwardly beveled at the entrance of each notch at f9 to facilitate the entrance of the dropped detector thereinto. The notches are of such depth that preferably a detector will be embraced for about one-half its width, eifectually preventing twisting or bending thereof and obviating any serration or notching of the back bar against which the detector is pressed by the vibrator.

Referring to Fig. 2, it will be seen that the flaring entrances of adjacent notches are so located that the oppositely-beveled sides intersect, as at 10, so that a detector will be guided into one or other of the notches at opposite sides of the dividing-wall. The vibrator is thus in effect a comb-like member, the tines f 12of which have pointed or beveled ends and parallel sides.

Vhile I have herein shown the stop-motionactuating detectors also serving as lheddles, it will be obvious that the detectors and heddles may be entirely independent, the vibrator cooperating with the detecting member in either case.

A separately-actuated vibrator may coperate with each series of detectors, or the vibrators maybe arranged in groups, as herein shown, and any other suitable form of mechanism for giving the vibrator its normal movement may be employed instead of that herein shown.

In the drawings a detector (ZX is shown as in abnormal position, due to breakage of its warp-thread, and engagedby the vibrator, stopping the latter, to thereby eect the stoppage of the loom automatically.

Having fully described my invention, what I claim, and desire to secure by Letters Pat-` ent, is-

l. In a loom the following instrumentalities, in combination, viz: a series of flat ver-` tically-reciprocating warp-stop-motion-actuating detectors movable into abnormal operative position upon breakage or undue slackening of a warp-thread, a cooperating vi-` brator having parallel-sided notches to be entered by a detector in abnormal position, andi means to normally move said vibrator back? and forth in the direction of the length of` the warp-stopping means, and connections therefrom to the vibrator,substantially as described.

2. In a loom the following instrumentalities in combination, viz: a series of flat vertically-reciprocating warp-stop-motion-actuating detectors, movable into abnormal operative position upon breakage orundue slackening of a warp thread, a cooperating vibrator having parallel-sided notches and fiaring entrances to be entered by a dropped detector, and means to normally move the vibrator in the direction of the length of the warp-stopping means, and connections therefrom to the vibrator, substantially as described.

3. In a loom the following instrumentalities in combination, viz: a series of flat vcrtically-reciprocating Warp-stop-motion-actuating detectors, a cooperating vibratonhaving notches with parallel sides of a depth equal to substantially one-half the Width vot' and to be entered by a detectorin abnormal position, and means to normally move the vibrator in the direction of the length of the warp-stopping means, and connections therefrom to the vibrator, substantially as described.

Ll. In a loom the following instrumentalities, viz: a series of flat vertically-reciprocating warp-stop-motion-actuating detectors movable into abnormal operative position upon breakage or undue slackenin g of a Warpthread, a coperatin g vibrator, slotted to form tines presenting parallel sides and pointed outer ends, said slots being entered by a detector in abnormal position, and means to normally move said vibrator back and forth in the direction of the length lof the warpstopping means, and connections therefrom to the vibrator, substantially as described.

5. As an article of manufacture, a comblike vibrator for warp-stop-motion mechanisms, presenting a series of tines having parallel sides and pointed outer ends, substantially as described.

,In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

WILLIAM F. DRAPER. lVitnesses:

GEO. OTIs DRAPER, HERBERT S. MANLEY. 

